In article
, Paul
Herber writes
On Thu, 28 Feb 2019 12:21:12 +0000, bert wrote:

In one bedroom we have a ceiling fan supplied from the lighting circuit.
It's been there for over 10 years no problems.
In the past few nights a couple of times when switching it off the RCD
protecting the ring mains has tripped. But the lighting circuits don't
go through it and the lights are still on including the one which is
part of the fan and the fan itself can be switched back on.
Puzzled as to how this can happen - and where to start looking.

Earthed via a the ring-main circuit?



Are you suggesting that the qualified certified to whatever professional
electrician who did this has screwed up? Well actually his dozy
apprentice did most of the actual work 'til he fired him so yes quite
possible.
--
bert